Citigroup reported $4.3 billion in net income for the third quarter, or $1.35 per diluted share, up 53 percent from $2.8 billion, or $0.88 per share, in the same quarter a year ago. The bank also has revenues that reached $18.7 billion, down from $19.7 billion last year.

Citigroup earned credit for $162.7 million in consumer relief toward fulfilling its $2.5 billion obligation under the terms of a July 2014 settlement with the U.S. Department of Justice and five states for selling toxic residential mortgage-backed securities to investors before the financial crisis, according to a report from the settlement monitor released Thursday.

The lawsuit, originally introduced to a lower court by the City of Miami on December 13, 2011, alleged that each bank in question had participated in a decade-long pattern of discriminatory lending by targeting blacks and Hispanics for predatory loans.

The net income high at Goldman Sachs is mostly credited to the record first half results in Investment Banking and Investment Management. Net revenues for investment banking reached $2.02 billion for Q2, a 13 percent increase from Q2 2014 and 6 percent higher than Q1 2015.

The letter was prompted by news reports that surfaced earlier this month stating that Citigroup, one of the servicers named in the settlement, had missed paying some 24,000 borrowers who were owed money from the settlement. Waters sent her letter on Friday to Fed Inspector General Mark Bialek and Treasury Inspector General Eric Thorson asking them to perform further examinations to see if other borrowers were missed.

Citigroup is preparing to pay approximately $20 million to thousands of homeowners who were eligible to receive compensation as part of the Independent Foreclosure Settlement reached between the government and 10 mortgage servicers two years ago over loan servicing and foreclosure procedure violations, according to media reports.